【摘 要】
：
A tunable metamaterial absorber (MA) with dual-broadband and high absorption properties at terahertz (THz) fre-quencies is designed in this work.The MA consists of a periodic array of flower-like monolayer graphene patterns at top,a SiO2 dielectric spacer
【机 构】
：
School of Physics and Electrical Engineering,Anyang Normal University,Anyang 455000,China;Department
论文部分内容阅读
A tunable metamaterial absorber (MA) with dual-broadband and high absorption properties at terahertz (THz) fre-quencies is designed in this work.The MA consists of a periodic array of flower-like monolayer graphene patterns at top,a SiO2 dielectric spacer in middle,and a gold ground plane at the bottom.The simulation results demonstrate that the designed MA has two wide absorption bands with an absorption of over 90％ in frequency ranges of 0.68 THz-l.63 THz and 3.34 THz-4.08 THz,and the corresponding relative bandwidths reach 82.3％ and 20％,respectively.The peak absorp-tivity of the absorber can be dynamically controlled from less than 10％ to nearly 100％ by adjusting the graphene chemical potential from 0 eV to 0.9 eV.Furthermore,the designed absorber is polarization-insensitive and has good robustness to incident angles.Such a high-performance MA has broad application prospects in THz imaging,modulating,filtering,etc.
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